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J Biomed Nanotechnol. 2012 Aug;8(4):703-8.

Comparison of pharmacokinetic profiles of PM02734 loaded lipid nanoparticles and cyclodextrins: in vitro and in vivo characterization.

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Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Navarra, C/Irunlarrea 1, E-31080 Pamplona, Spain.


PM02734 is a chemically synthesized depsipeptide derived from the marine kahalalides family with a broad spectrum of activity against solid tumors in vitro and in vivo, but presenting low bioavailability. In this work, solid lipid nanoparticles made of Precirol ATO 5 have been developed using a hot homogenization method followed by high shear homogenization and ultrasonication. These solid lipid nanoparticles show suitable size (around 150 nm) and encapsulation efficiency (nearly 70%) for the oral administration of the compound PM02734. A physical-chemical stability study was performed after 6 months of storage at different thermical conditions, concluding that solid lipid nanoparticles stored at 4 degrees C were more stable than solid lipid nanoparticles stored at 25 degrees C. The pharmacokinetic profile of drug-loaded solid lipid nanoparticles was also evaluated in Beagle dogs and compared with that of a cyclodextrin-based delivery system by means of AUC, C(max) and T(max) parameter estimation. Solid lipid nanoparticle based formulation provided a sustained release of the drug for a longer period of time than the cyclodextrins.

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